Electric power industry
There are two main types of power transmission lines – overhead lines and cable lines. Traditionally, in high-voltage networks, the total length of overhead lines exceeded the total length of cable lines. Therefore, some errors in the calculations of impedances of cable lines were not able to lead to serious consequences. However, gradually, especially with
In the energy sector, there is more and more complex computer software for calculating equipment, various network operating modes and transients. On the one hand, this is good, but on the other hand, it personally causes me some fear. I will try to clarify my thoughts. Many of the software methods give the impression of
The distribution of the book “High Voltage Cable Lines” (dated 2024) has begun: This electronic book, dated 2024, explores the design, construction and operation of alternating current cable lines rated from 6 to 500 kV, consisting of single-core or three-core cables with XLPE insulation. It is intended for employees of design organizations and power grid companies,
For relay protection and grid automatization, adjacent switchgears must exchange the necessary information with each other. Previously, communication was organized primarily through phase wires of an overhead line due to the high-frequency signals superimposed on currents and voltages of industrial frequency 50 Hz. In recent years, the situation has changed, and fiber-optic connections have become
High voltage cable terminations are usually installed vertically. This allows you:✅ To ensure the absence of mechanical influences bending the termination under its own weight and the weight of the cable.✅ To ensure high-quality filling of the termination with dielectric oil (not relevant for terminations of dry-type or gas-type). However, sometimes, for various reasons, the
Birds build nests on the overhead line towers (pylons, poles). Rats feed on the outer sheath of cable lines. Fungus settles on polymer insulators (Photo). What’s next? The photo shows the 110 kV disconnector support insulators installed in Karelia (a region on the southern border of Finland). During operation, it was noticed that over time,
Previously, cars had nothing to do with electric grids. However, with the development of renewable energy sources (solar, wind, etc.), the situation began to change. We gradually started to integrate ordinary personal cars into the energy sector. A new era has begun – hybrid or even fully electric cars have appeared. Such cars, for example,
We are absolutely sure of π=3.1415926535 and e=2.7182818284 – we use them in software. However, in our everyday life, we specify only 3 digits (3.14 and 2.72), and this is enough. Rarely we give 5 digits at once (3.1416 and 2.7183). If someone indicates 6 or more, we will consider it beyond reasonable. How do
Among all the programs for modeling processes in electrical networks, one of the most common is EMTP (ATP, ATP-EMTP). A huge amount of research is carried out using EMTP, and this is clearly seen by the number of mentions of EMTP in various publications. Such success of the EMTP became possible due to the fact